make the savers use profile_load

tiff, jpeg and png save all use profile_load to attach profiles

ChangeLog

@@ -15,7 +15,7 @@
 - dzsave has a new skip_blanks option
 - add vips_CMYK2XYZ() and vips_XYZ2CMYK(), plus associated routes 
 - include cmyk and srgb fallback profiles
-- add vips_profile_load()
+- add vips_profile_load() and use it everywhere
 
 4/1/19 started 8.7.4
 - fix memory leak in magickload [kleisauke]

libvips/colour/profile_load.c

@@ -194,11 +194,20 @@ vips_profile_load_init( VipsProfileLoad *load )
  * @profile: (out): loaded profile
  * @...: %NULL-terminated list of optional named arguments
  *
- * Load a named profile. If the name is one of the built in ICC profiles, then
- * that is returmed, otherwise a profile is loaded from the system profile
- * area.
+ * Load a named profile. 
  *
- * The special name "none" will make this operation return NULL for @profile.
+ * Profiles are loaded from four sources:
+ *
+ * - The special name `"none"` means no profile. @profile will be %NULL in this
+ *   case.
+ *
+ * - @name can be the name of one of the ICC profiles embedded in libvips.
+ *   These names can be at least `"cmyk"` and `"srgb"`.
+ *
+ * - @name can be the full path to a file.
+ *
+ * - @name can be the name of an ICC profile in the system profile directory
+ *   for your platform.
  *
  * Returns: 0 on success, -1 on error
  */

libvips/foreign/jpegsave.c

@@ -75,7 +75,7 @@ typedef struct _VipsForeignSaveJpeg {
 	 */
 	int Q;
 
-	/* Profile to embed .. "none" means don't attach a profile.
+	/* Profile to embed.
 	 */
 	char *profile;
 
@@ -434,10 +434,9 @@ vips_foreign_save_jpeg_mime_init( VipsForeignSaveJpegMime *mime )
  *
  * Use @Q to set the JPEG compression factor. Default 75.
  *
- * Use @profile to give the filename of a profile to be embedded in the JPEG.
+ * Use @profile to give the name of a profile to be embedded in the JPEG.
  * This does not affect the pixels which are written, just the way 
- * they are tagged. You can use the special string "none" to mean 
- * "don't attach a profile".
+ * they are tagged. See vips_profile_load() for details on profile naming. 
  *
  * If no profile is specified and the VIPS header 
  * contains an ICC profile named #VIPS_META_ICC_NAME, the

libvips/foreign/pngsave.c

@@ -332,8 +332,7 @@ vips_foreign_save_png_buffer_init( VipsForeignSavePngBuffer *buffer )
  *
  * Use @profile to give the filename of a profile to be embedded in the PNG.
  * This does not affect the pixels which are written, just the way 
- * they are tagged. You can use the special string "none" to mean 
- * "don't attach a profile".
+ * they are tagged. See vips_profile_load() for details on profile naming. 
  *
  * If @profile is specified and the VIPS header 
  * contains an ICC profile named VIPS_META_ICC_NAME ("icc-profile-data"), the

libvips/foreign/tiffsave.c

@@ -509,8 +509,7 @@ vips_foreign_save_tiff_buffer_init( VipsForeignSaveTiffBuffer *buffer )
  *
  * Use @profile to give the filename of a profile to be embedded in the TIFF.
  * This does not affect the pixels which are written, just the way 
- * they are tagged. You can use the special string "none" to mean 
- * "don't attach a profile".
+ * they are tagged. See vips_profile_load() for details on profile naming. 
  *
  * If no profile is specified and the VIPS header 
  * contains an ICC profile named #VIPS_META_ICC_NAME, the

libvips/foreign/vips2jpeg.c

@@ -196,8 +196,6 @@ typedef struct {
 	struct jpeg_compress_struct cinfo;
         ErrorManager eman;
 	JSAMPROW *row_pointer;
-	char *profile_bytes;
-	size_t profile_length;
 	VipsImage *inverted;
 } Write;
 
@@ -207,7 +205,6 @@ write_destroy( Write *write )
 	jpeg_destroy_compress( &write->cinfo );
 	VIPS_FREEF( fclose, write->eman.fp );
 	VIPS_FREE( write->row_pointer );
-	VIPS_FREE( write->profile_bytes );
 	VIPS_UNREF( write->inverted );
 
 	g_free( write );
@@ -227,8 +224,6 @@ write_new( VipsImage *in )
 	write->eman.pub.error_exit = vips__new_error_exit;
 	write->eman.pub.output_message = vips__new_output_message;
 	write->eman.fp = NULL;
-	write->profile_bytes = NULL;
-	write->profile_length = 0;
 	write->inverted = NULL;
 
         return( write );
@@ -358,17 +353,25 @@ write_profile_data (j_compress_ptr cinfo,
 static int
 write_profile_file( Write *write, const char *profile )
 {
-	if( !(write->profile_bytes = 
-		vips__file_read_name( profile, vips__icc_dir(), 
-		&write->profile_length )) ) 
+	VipsBlob *blob;
+
+	if( vips_profile_load( profile, &blob, NULL ) )
 		return( -1 );
-	write_profile_data( &write->cinfo, 
-		(JOCTET *) write->profile_bytes, write->profile_length );
+
+	if( blob ) {
+		size_t length;
+		const void *data = vips_blob_get( blob, &length );
+
+		write_profile_data( &write->cinfo, (JOCTET *) data, length );
 
 #ifdef DEBUG
-	printf( "write_profile_file: attached profile \"%s\"\n", profile );
+		printf( "write_profile_file: "
+			"attached profile \"%s\"\n", profile );
 #endif /*DEBUG*/
 
+		vips_area_unref( (VipsArea *) blob );
+	}
+
 	return( 0 );
 }
 
@@ -376,15 +379,16 @@ static int
 write_profile_meta( Write *write )
 {
 	const void *data;
-	size_t size;
+	size_t length;
 
-	if( vips_image_get_blob( write->in, VIPS_META_ICC_NAME, &data, &size ) )
+	if( vips_image_get_blob( write->in, 
+		VIPS_META_ICC_NAME, &data, &length ) )
 		return( -1 );
-	write_profile_data( &write->cinfo, data, size );
+	write_profile_data( &write->cinfo, data, length );
 
 #ifdef DEBUG
 	printf( "write_profile_meta: attached %zd byte profile from header\n",
-		size );
+		length );
 #endif /*DEBUG*/
 
 	return( 0 );
@@ -596,10 +600,9 @@ write_vips( Write *write, int qfac, const char *profile,
 			return( -1 );
 
 		/* A profile supplied as an argument overrides an embedded 
-		 * profile. "none" means don't attach a profile.
+		 * profile. 
 		 */
-		if( profile && 
-			strcmp( profile, "none" ) != 0 &&
+		if( profile &&
 			write_profile_file( write, profile ) )
 			return( -1 );
 		if( !profile && 

libvips/foreign/vips2tiff.c

@@ -325,24 +325,29 @@ struct _Wtiff {
 	int image_height;
 };
 
-/* Embed an ICC profile from a file.
+/* Write an ICC Profile from a file into the JPEG stream.
  */
 static int
 embed_profile_file( TIFF *tif, const char *profile )
 {
-	char *buffer;
-	size_t length;
+	VipsBlob *blob;
 
-	if( !(buffer = vips__file_read_name( profile, 
-		vips__icc_dir(), &length )) )
+	if( vips_profile_load( profile, &blob, NULL ) )
 		return( -1 );
-	TIFFSetField( tif, TIFFTAG_ICCPROFILE, length, buffer );
-	vips_free( buffer );
+
+	if( blob ) {
+		size_t length;
+		const void *data = vips_blob_get( blob, &length );
+
+		TIFFSetField( tif, TIFFTAG_ICCPROFILE, length, data );
 
 #ifdef DEBUG
-	printf( "vips2tiff: attached profile \"%s\"\n", profile );
+		printf( "vips2tiff: attached profile \"%s\"\n", profile );
 #endif /*DEBUG*/
 
+		vips_area_unref( (VipsArea *) blob );
+	}
+
 	return( 0 );
 }
 
@@ -352,11 +357,11 @@ static int
 embed_profile_meta( TIFF *tif, VipsImage *im )
 {
 	const void *data;
-	size_t size;
+	size_t length;
 
-	if( vips_image_get_blob( im, VIPS_META_ICC_NAME, &data, &size ) )
+	if( vips_image_get_blob( im, VIPS_META_ICC_NAME, &data, &length ) )
 		return( -1 );
-	TIFFSetField( tif, TIFFTAG_ICCPROFILE, size, data );
+	TIFFSetField( tif, TIFFTAG_ICCPROFILE, length, data );
 
 #ifdef DEBUG
 	printf( "vips2tiff: attached profile from meta\n" );
@@ -426,8 +431,7 @@ wtiff_layer_new( Wtiff *wtiff, Layer *above, int width, int height )
 static int
 wtiff_embed_profile( Wtiff *wtiff, TIFF *tif )
 {
-	if( wtiff->icc_profile && 
-		strcmp( wtiff->icc_profile, "none" ) != 0 &&
+	if( wtiff->icc_profile &&
 		embed_profile_file( tif, wtiff->icc_profile ) )
 		return( -1 );
 

libvips/foreign/vipspng.c

@@ -1071,13 +1071,13 @@ write_vips( Write *write,
 	 */
 	if( profile && 
 		!strip ) {
-		if( strcmp( profile, "none" ) != 0 ) { 
-			void *data;
-			size_t length;
+		VipsBlob *blob;
 
-			if( !(data = vips__file_read_name( profile, 
-				vips__icc_dir(), &length )) ) 
-				return( -1 );
+		if( vips_profile_load( profile, &blob, NULL ) )
+			return( -1 );
+		if( blob ) {
+			size_t length;
+			const void *data = vips_blob_get( blob, &length );
 
 #ifdef DEBUG
 			printf( "write_vips: "
@@ -1087,6 +1087,8 @@ write_vips( Write *write,
 
 			png_set_iCCP( write->pPng, write->pInfo, "icc", 
 				PNG_COMPRESSION_TYPE_BASE, data, length );
+
+			vips_area_unref( (VipsArea *) blob );
 		}
 	}
 	else if( vips_image_get_typeof( in, VIPS_META_ICC_NAME ) &&